Agrus Kos, Eternal Soldier, The Jolly Balloon Man, Orthion, Hero of Lavabrink, and Phyrexian Altar

Prerequisites

• Agrus Kos, Eternal Soldier on the battlefield
• The Jolly Balloon Man on the battlefield
• Orthion, Hero of Lavabrink on the battlefield
• Phyrexian Altar on the battlefield
• available

Steps

1. Activate The Jolly Balloon Man by paying and tapping it, targeting Agrus Kos
2. Agrus Kos triggers, causing you to pay to copy the Jolly Balloon Man ability targeting each other creature the ability can target
3. Resolve all Jolly Balloon Man abilities, creating a token copy of each other creature you control that is a 1/1 Balloon with haste
4. As needed, put the oldest Agrus Kos and Orthion into your graveyard due to the legend rule
5. Activate Phyrexian Altar four times by sacrificing four tokens except the Orthion or Agrus Kos tokens, adding
6. Activate the Orthion token's first ability by paying and tapping it, targeting the Agrus Kos token
7. Agrus Kos triggers, causing you to pay to copy the Orthion ability targeting each other creature the ability can target
8. Resolve all Orthion abilities, creating a token copy of each other creature you control with haste
9. As needed, put the oldest Agrus Kos and Jolly Balloon Man into your graveyard due to the legend rule
10. Activate Phyrexian Altar three times by sacrificing four tokens except the Orthion or Agrus Kos tokens, adding
11. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite colored mana
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite creature tokens with haste